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Jurnal Teknik Industri

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Published by Universitas Kristen Petra Surabaya

ISSN : 14112485 EISSN : 20877439 DOI : -

Core Subject : Engineering,

Industrial & Manufacturing Engineering

Jurnal Teknik Industri aims to: Promote a comprehensive approach to the application of industrial engineering in industries as well as incorporating viewpoints of different disciplines in industrial engineering. Strengthen academic exchange with other institutions. Encourage scientist, practicing engineers, and others to conduct research and other similar activities.

Arjuna Subject : -

Articles 8 Documents

Search results for , issue "Vol. 14 No. 2 (2012): DECEMBER 2012" : 8 Documents clear

Deteksi Keausan Alat pada Proses Pengeboran Sumber Alam Siana Halim; Felecia .
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

In this paper we applied change point detection methods for failures detection in the drilling process. We calculated the change points on three drilling parameters, i.e., the weight on bit, top drive torque and rate of penetration. Using the concept of reliability, we measured the time between change points as the time between failures. The minimum of mean time between change points from those three parameters is suggested to be the time for monitoring the drilling process.

Penentuan Kriteria Pemilihan Strategi Sistem Manufaktur Menggunakan Analytic Hierarchy Process Apriani Soepardi; Puryani .; Mochammad Chaeron; Isti Anggraini
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents the decision making process for the selection of criteria manufacturing system using AHP. The accuracy of the selection strategy is based on many criteria that termed as agility capabilities. Several influential criteria that is used in the selection are responsiveness, product quality, product cost, operator skills, and inventory. From these criteria, manufacturing responsiveness has the highest priority weight. On these criteria, the company cast metal is required to have the agility capabilities in reduction of lead-time for product development, new product introduction, and a wide variety of products. While the criteria for product quality takes places at second priority, followed by product cost, operator skill and inventory. From agility capability priorities that must be owned by the company of cast metal, the manufacturing system according to the characteristics of the organization and be able to respond appropriately to environmental changes is lean manufacturing system.

Pengukuran Tingkat Eko-efisiensi Menggunakan Life Cycle Assessment untuk Menciptakan Sustainable Production di Usaha Kecil Menengah Batik Diana Puspita Sari; Sri Hartini; Dyah Ika Rinawati; Tri Setyo Wicaksono
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Pekalongan is one of the batik cities in Central Java, many batik SMEs thrive in Pekalongan. Batik SMEs indicated a cause of environmental pollution that occurred in the city of Pekalongan. Pollution caused by the use of chemicals in the dyeing process. This study aims to measure the eco-costs and eco-efficiency rate of batik products, as well as looking for suggestions on improving eco-efficiency. Eco-efficiency rate is measured by using LCA (Life Cycle Assess-ment) doped with SimaPro software. This method is used to evaluate the environmental impacts arising from the use of the constituent materials. The results of the data processing show that the value of eco-costs for chemical dye batik is Rp 188,028.32, with eco-efficiency rate is 68.74%. Batik industries are not sustainable and affordable. Economizing of the resourcing and applying cleaner production can be accomplished to enhance the eco-efficiency rate. Cleaner production can be achieved using natural dyes and implement End of Life strategies.

Model Persediaan Bahan Baku Multi Item dengan Mempertimbangkan Masa Kadaluwarsa, Unit Diskon dan Permintaanyang Tidak Konstan Stanley Surya Jaya; Tanti Octavia; I Gede Agus Widyadana
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Many research focus on inventory problem, since inventory has significant effect to financial of a company. This research tries to develop multi items inventory models by considering expire date and unit discount with stochastic demand. Stochatic demand result in possibility of lost sales and backorder, so lost sales and backorder will be considered in the models. The models are solved using simulation and Genetic Algorithm due to complexity of the models. A numerical example and sensitivity analysis are conducted to verify the models. The sensitivity analysis shows that inventory cost and backorder cost have significant effect to ordering time.

Model Identifikasi Risiko dan Strategi Peningkatan Nilai Tambah pada Rantai Pasok Kelapa Sawit Syarif Hidayat; Marimin .; Ani .; Sukardi .; Mohamad Yani
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

The actors in the palm oil supply chain industry are the farmers, traders, crude palm oil (CPO) factories, frying-oil factories (refineries), distributors and the consumers. The farmers sell fresh fruit bunches (FFB) to the CPO factories through traders. FFB is converted into CPO which is later sold to the refineries. Refineries convert CPO into frying oil which is sold to the consumers through the distributors. There are risks due to product quality consistency, price fluctuation and supply chain continuity. This study has two objectives: (1) to develop a model to identify, evaluate and rank the risks, (2) to develop a model to identify and rank the strategies in improving their added value. Data for this study was obtained through direct interviews and questionnaires. The respondents were selected experts and industry players. The data were processed using Fuzzy Analytic Hierarchy Process (FAHP) models. The first FAHP model showed that the two most important risks were the supply chain continuity and product quality. The second FAHP model showed that the recommended strategies to improve the added values of the actors were the improvement of the infrastructure/cluster development, followed by the usage of superior seeds and cultivation techniques.

Are the Experts Really Experts? a Cognitive Ergonomics Investigation for Project Estimations Budi Hartono; Bhery Aditya Saputra
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Uniqueness is a major characteristic of any project systems. Hence it is virtually in-feasible for project analysts to utilize data from past projects as references for subsequent project planning and scheduling. Most project analysts would then depend on intuition, gut feeling and experiences to develop quantitative models for project scheduling and analysis which, according to past studies, is prone towards systematic errors. This study attempts to investigate the perfor-mance of both ‘experts’ and ‘non-experts’ when utilizing their cognitive capability to estimate pro-ject durations in group/non-group settings. A cognitive ergonomics perspective -which views human capability to make judgment as rationally bounded - is utilized in this investigation. An empirical approach is used to inquiry data from ‘projects’ on which ‘experts’ and ‘non-experts’ are required to provide prior estimate on project durations. The estimates are then gauged against the actual duration. Results show that some systematic cognitive judgmental errors (biases) are observable for both experts and non-experts. The identified biases include: anchoring bias as well as accuracy bias.

Kajian Termal Akibat Paparan Panas dan Perbaikan Lingkungan Kerja Listiani Nurul Huda; Kristoffel Colbert Pandiangan
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study aims to analyze thermal condition and improve working environment by designed ventilation systems due to improve air circulation and reduce heat exposure occurred so that workers feel more comfortable working. This study describes the thermal conditions of work and its relation to psychological aspects operator traced through thermal questionnaires. By knowing the conditions of the proposed design is further improved ventilation system. The measurement results show that the thermal average air temperature in the formulations room was 31.7 °C and wind speed of 0.27 m/s. Heat Stress Index (HSI) in the workplace about 94.41%, which indicates the great potential of the dangers of heat stress. Wet Bulb Globe Temperature (WBGT) index gained 27.64 °C so that the percentage of working time and rest time workers was 6.55 and 1.55 hours, where the percentage is not according to the standard. Productive work time workers only achieved ranged from (76.58 ± 5.91)%, where the figure is still below the standards of the company. Simulation with Computer Fluid Dynamic (CFD) software shows actual workplace conditions are very hot and poorly ventilated. By conducting some simulations improvement, then found a comfortable room conditions and air circulation smoothly. Thermal comfort is finally concluded comfortable room after Cv’s room obtained exceeds 0.34 m/s in accordance with the Macfarlane theory’s.

Harmony Search for Balancing Two-sided Assembly Lines Hindriyanto Dwi Purnomo; Hui-Ming Wee; Hsin Rau
Jurnal Teknik Industri Vol. 14 No. 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Two-sided assembly lines balancing problems are important problem for large-sized products such as cars and buses, in which, tasks operations can be performed in the two sides of the line. In this paper, Harmony Search algorithm is proposed to solve two-sided assembly lines balancing problems type-I (TALBP-I). The proposed method adopts the COMSOAL heuristic and specific features of TALBP in the Harmony operators – the harmony memory consideration, random selection and pitch adjustment – in order to maintain the local and global search. The proposed method is evaluated based on 6 benchmark problems that are commonly used in TALBP. The experiment results show that the proposed method work well and produces better solution than the heuristic method and genetic algorithm.

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